CA2873238C - Apparatus for endoscopic procedures - Google Patents
Apparatus for endoscopic procedures Download PDFInfo
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- CA2873238C CA2873238C CA2873238A CA2873238A CA2873238C CA 2873238 C CA2873238 C CA 2873238C CA 2873238 A CA2873238 A CA 2873238A CA 2873238 A CA2873238 A CA 2873238A CA 2873238 C CA2873238 C CA 2873238C
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- jaw member
- lever
- drive beam
- end effector
- drive
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/003—Steerable
- A61B2017/00305—Constructional details of the flexible means
- A61B2017/00314—Separate linked members
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
- A61B2017/00398—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like using powered actuators, e.g. stepper motors, solenoids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00473—Distal part, e.g. tip or head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00681—Aspects not otherwise provided for
- A61B2017/00734—Aspects not otherwise provided for battery operated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07285—Stapler heads characterised by its cutter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
- A61B2017/2927—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
A surgical stapling apparatus includes a handle assembly, a shaft assembly extending distally from the handle assembly, and an end effector selectively detachable from the shaft assembly. The end effector includes a first jaw member and a second jaw member. The first jaw member supports a lever that is pivotally movable relative to the first jaw member between an extended position and a retracted position. The lever is in contact with a leaf spring to spring bias the lever to the extended position. The second jaw member supports a drive beam that is selectively engagable with the lever to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state.
Description
APPARATUS FOR ENDOSCOPIC PROCEDURES
TECHNICAL FIELD
100011 The present disclosure relates to surgical apparatus, devices and/or systems for performing endoscopic surgical procedures and methods of use thereof. More specifically, the present disclosure relates to electromechanical, hand-held surgical apparatus, devices and/or systems configured for use with removable disposable loading units and/or single use loading units for clamping, cutting, and/or stapling tissue.
BACKGROUND
100021 A number of surgical device manufacturers have developed product lines with proprietary drive systems for operating and/or manipulating electromechanical surgical devices.
Some electromechanical surgical devices include a handle assembly, which is reusable, and replaceable loading units and/or single use loading units or the like that are selectively connected to the handle assembly prior to use and then disconnected from the handle assembly following use, in order to be disposed of or in some instances sterilized for re-use.
[0003] Many of these electromechanical surgical devices are relatively expensive to manufacture, purchase, and/or operate. There is a desire by manufactures and end users to develop electromechanical surgical devices that are relatively inexpensive to manufacture, purchase, and/or operate.
[0004] Accordingly, a need exists for electromechanical surgical apparatus, devices and/or systems that are relatively economical to develop and manufacture, to store and ship, as well as economical and convenient to purchase and use from the end user's perspective.
SUMMARY
[0005] According to one aspect of the present disclosure, an end effector includes a mounting portion and first and second jaw members that extend distally from the mounting portion. A fastener cartridge is secured to the second jaw member. The fastener cartridge supports a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge.
[0006] In another aspect, a surgical stapling apparatus includes a handle assembly, a shaft assembly extending distally from the handle assembly, and an end effector selectively detachable from the shaft assembly. In embodiments the surgical stapling apparatus is powered.
[0007] The first jaw member includes a tissue engaging surface and may support a lever assembly. The second jaw member may support a drive beam that is selectively engagable with the lever assembly to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state. The first jaw member may define a ramp. The drive beam may be engagable with the ramp to pivot the first jaw member and the second jaw member to the approximated state and enable the drive beam to distally translate along the first and second jaw members.
[0008] The drive beam may configured to disengage from the lever assembly, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member. The drive beam may define a notch
TECHNICAL FIELD
100011 The present disclosure relates to surgical apparatus, devices and/or systems for performing endoscopic surgical procedures and methods of use thereof. More specifically, the present disclosure relates to electromechanical, hand-held surgical apparatus, devices and/or systems configured for use with removable disposable loading units and/or single use loading units for clamping, cutting, and/or stapling tissue.
BACKGROUND
100021 A number of surgical device manufacturers have developed product lines with proprietary drive systems for operating and/or manipulating electromechanical surgical devices.
Some electromechanical surgical devices include a handle assembly, which is reusable, and replaceable loading units and/or single use loading units or the like that are selectively connected to the handle assembly prior to use and then disconnected from the handle assembly following use, in order to be disposed of or in some instances sterilized for re-use.
[0003] Many of these electromechanical surgical devices are relatively expensive to manufacture, purchase, and/or operate. There is a desire by manufactures and end users to develop electromechanical surgical devices that are relatively inexpensive to manufacture, purchase, and/or operate.
[0004] Accordingly, a need exists for electromechanical surgical apparatus, devices and/or systems that are relatively economical to develop and manufacture, to store and ship, as well as economical and convenient to purchase and use from the end user's perspective.
SUMMARY
[0005] According to one aspect of the present disclosure, an end effector includes a mounting portion and first and second jaw members that extend distally from the mounting portion. A fastener cartridge is secured to the second jaw member. The fastener cartridge supports a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge.
[0006] In another aspect, a surgical stapling apparatus includes a handle assembly, a shaft assembly extending distally from the handle assembly, and an end effector selectively detachable from the shaft assembly. In embodiments the surgical stapling apparatus is powered.
[0007] The first jaw member includes a tissue engaging surface and may support a lever assembly. The second jaw member may support a drive beam that is selectively engagable with the lever assembly to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state. The first jaw member may define a ramp. The drive beam may be engagable with the ramp to pivot the first jaw member and the second jaw member to the approximated state and enable the drive beam to distally translate along the first and second jaw members.
[0008] The drive beam may configured to disengage from the lever assembly, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member. The drive beam may define a notch
2 therein and may support a knife adapted to cut tissue as the drive beam translates along the fastener cartridge.
[0009] The lever assembly may include a lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position. The lever may be engaged with the notch of the drive beam when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in the extended position. The lever may be engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state. The lever may be configured to disengage from the notch as the lever pivots from the extended position to the retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state. The drive beam may be distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
100101 A spring assembly may be supported by the first jaw member. The spring assembly may include a spring configured to contact the lever to bias the lever to the extended position. The spring may be a leaf spring.
[0011] A drive screw may be supported by the second jaw member that is operably associated with the drive beam to translate the drive beam as the drive screw rotates. The drive beam may include a retention foot that threadably receives the drive screw.
The drive screw may be coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and
[0009] The lever assembly may include a lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position. The lever may be engaged with the notch of the drive beam when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in the extended position. The lever may be engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state. The lever may be configured to disengage from the notch as the lever pivots from the extended position to the retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state. The drive beam may be distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
100101 A spring assembly may be supported by the first jaw member. The spring assembly may include a spring configured to contact the lever to bias the lever to the extended position. The spring may be a leaf spring.
[0011] A drive screw may be supported by the second jaw member that is operably associated with the drive beam to translate the drive beam as the drive screw rotates. The drive beam may include a retention foot that threadably receives the drive screw.
The drive screw may be coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and
3 translation of the drive beam through the fastener cartridge. The drive screw may have a head projecting from a proximal end portion thereof. The head may define a pivot axis therethrough that is transverse to a longitudinal axis of the end effector between proximal and distal end portions of the end effector. The second jaw member may be configured to pivot relative to the first jaw member about the pivot axis.
[0012] Other aspects, features, and advantages will be apparent from the description, the drawings, and the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
100131 The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiment(s) given below, serve to explain the principles of the disclosure, wherein:
100141 FIG. 1 is a perspective view of an electromechanical surgical system according to the principles of the present disclosure;
[0015] FIG. 2 is a perspective view, with parts separated, of the electromechanical surgical system of FIG. 1;
100161 FIG. 3 is a front, perspective view of an end effector of the electromechanical surgical system of FIGS. 1 and 2;
[0017] FIG. 4 is a rear, perspective view of the end effector of FIG. 3;
[0012] Other aspects, features, and advantages will be apparent from the description, the drawings, and the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
100131 The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiment(s) given below, serve to explain the principles of the disclosure, wherein:
100141 FIG. 1 is a perspective view of an electromechanical surgical system according to the principles of the present disclosure;
[0015] FIG. 2 is a perspective view, with parts separated, of the electromechanical surgical system of FIG. 1;
100161 FIG. 3 is a front, perspective view of an end effector of the electromechanical surgical system of FIGS. 1 and 2;
[0017] FIG. 4 is a rear, perspective view of the end effector of FIG. 3;
4 [00181 FIG. 5 is a perspective view, with parts separated, of the end effector of FIGS. 3 and 4;
[0019] FIG. 6 is a side, cross-sectional, perspective view of the end effector of FIGS. 3-5, as taken through 6-6 of FIG. 4, showing the end effector in an unapproximated state;
[0020] FIG. 7 is an enlarged view of the indicated area of detail shown in FIG. 6;
[0021] FIG. 8 is a side, cross-sectional view of the end effector showing a drive beam thereof in a partially advanced position;
[0022] FIG. 9 is an enlarged view of the indicated area of detail shown in FIG. 8;
[0023] FIG. 10 is a side, cross-sectional view of the end effector in an approximated state with the drive beam thereof shown in a partially advanced position;
[0024] FIG. 11 is an enlarged view of the indicated area of detail shown in FIG. 10;
[0025] FIG. 12 is an enlarged, partial, cross-sectional view of the end effector showing the drive beam partially advanced; and [0026] FIG. 13 a side, cross-sectional view of the end effector in an approximated state with the drive beam thereof shown in a distally advanced position.
DETAILED DESCRIPTION OF EMBODIMENTS
100271 Embodiments of the presently disclosed electromechanical surgical system, apparatus and/or device are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views.
As used herein the term "distal" refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are farther from the user, while the term "proximal" refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are closer to the user.
[0028] Referring initially to FIGS. 1 and 2, an electromechanical, hand-held, powered surgical system is shown and generally designated 10. Electromechanical surgical system 10 includes a surgical apparatus or device in the form of an electromechanical, hand-held, powered surgical instrument 100 that is configured for selective attachment thereto of a plurality of different end effectors 400, via a shaft assembly 200, that are each configured for actuation and manipulation by the electromechanical, hand-held, powered surgical instrument 100. In particular, surgical instrument 100 is configured for selective connection with an articulation assembly 300 of shaft assembly 200, and, in turn, shaft assembly 200 is configured for selective connection with any one of a plurality of different end effectors 400 via articulation assembly 300.
[0029] Reference may be made to U.S. Patent Application Publication No.
2009/0101692, U.S. Patent Application Publication No. 2011/0121049, and U.S. Patent Application Publication No. 2013/0098966 for a detailed description of the construction and operation of exemplary electromechanical, hand-held, powered surgical instruments, the components of which are combinable and/or interchangeable with one or more components of powered surgical system 10 described herein Date Recue/Date Received 2021-05-12 [0030] Generally, as illustrated in FIGS. 1 and 2, surgical instrument 100 includes an instrument housing 102 having a lower housing portion 104, an intermediate housing portion 106 extending from and/or supported on lower housing portion 104, and an upper housing portion 108 extending from and/or supported on intermediate housing portion 106. The surgical instrument 100 has a controller (not shown) for controlling certain functions of the surgical system, collecting data, and performing other functions. Instrument housing 102 defines a cavity (not shown) therein in which a circuit board (not shown) and a drive mechanism (not shown) are situated.
[0031] The circuit board is configured to control the various operations of surgical instrument 100, as will be set forth in additional detail below. In accordance with the present disclosure, instrument housing 102 provides a housing in which a rechargeable battery (not shown), is removably situated. The battery is configured to supply power to any of the electrical components of surgical instrument 100.
[0032] Upper housing portion 108 of instrument housing 102 has a nose or connecting portion 108a configured to accept a corresponding shaft coupling assembly 204 of transmission housing 202 of shaft assembly 200. As seen in FIG. 2, connecting portion 108a of upper housing portion 108 of surgical instrument 100 defines a cylindrical recess 108b that receives shaft coupling assembly 204 of transmission housing 202 of shaft assembly 200 when shaft assembly 200 is mated to surgical instrument 100. The connecting portion 108a of the surgical instrument 100 has at least one rotatable drive member. In some embodiments, connecting portion 108a houses a plurality of rotatable drive members or connectors (not shown), each drive member of the plurality of drive members can be independently, and/or dependently, actuatable and rotatable by the drive mechanism (not shown) housed within instrument housing 102.
100331 Upper housing portion 108 of instrument housing 102 provides a housing in which the drive mechanism (not shown) is situated. The drive mechanism is configured to drive shafts and/or gear components in order to perform the various operations of surgical instrument 100. In particular, the drive mechanism is configured to drive shafts and/or gear components in order to selectively move end effector 400 relative to shaft assembly 200; to rotate anvil assembly 200 and/or end effector 400, about a longitudinal axis "X 1 " (see FIGS. 1 and 2), relative to instrument housing 102; to move an upper jaw member or anvil assembly 410 of end effector 400 relative to a lower jaw member or cartridge assembly 420 of end effector 400; to articulate and/or rotate the shaft assembly 200; and/or to fire a fastener cartridge 420a within cartridge assembly 420 of end effector 400.
100341 In accordance with the present disclosure, the drive mechanism may include a selector gearbox assembly (not shown); a function selection module (not shown), located proximal to the selector gearbox assembly, that functions to selectively move gear elements within the selector gearbox assembly into engagement with a second motor (not shown). The drive mechanism may be configured to selectively drive one of drive members or connectors of surgical instrument 100, at a given time.
100351 As illustrated in FIGS. 1 and 2, instrument housing 102 supports a pair of finger-actuated control buttons 124, 126 and/or rocker device(s) 130 (only one rocker device being shown). Each one of the control buttons 124, 126 and rocker device(s) 130 includes a respective magnet (not shown) that is moved by the actuation of an operator. In addition, the circuit board (not shown) housed in instrument housing 102 includes, for each one of the control buttons 124, 126 and rocker device(s) 130, respective Hall-effect switches (not shown) that are actuated by the movement of the magnets in the control buttons 124, 126 and rocker device(s) 130. The actuation of Hall-effect switch (not shown), corresponding to control buttons 124, 126 causes the circuit board to provide appropriate signals to the function selection module and the input drive component of the drive mechanism to open/close end effector 400 and/or to fire a stapling/cutting cartridge within end effector 400.
[0036] Similarly, the actuation of the Hall-effect switch, corresponding to rocker device 130, causes the circuit board to provide appropriate signals to the function selection module and the input drive component of the drive mechanism to rotate end effector 400 relative to shaft assembly 200 or rotate end effector 400 and shaft assembly 200 relative to instrument housing 102 of surgical instrument 100. Specifically, movement of rocker device 130 in a first direction causes end effector 400 and/or shaft assembly 200 to rotate relative to instrument housing 102 in a first direction, while movement of rocker device 130 in an opposite, e.g., second, direction causes end effector 400 and/or shaft assembly 200 to rotate relative to instrument housing 102 in an opposite, e.g., second, direction.
100371 Turning now to FIGS. 3-13, end effector 400 is shown and described.
End effector 400 is configured and adapted to apply a plurality of linear rows of fasteners "F" (e.g., staples, see FIG. 5). In certain embodiments, the fasteners are of various sizes, and, in certain embodiments, the fasteners have various lengths or rows, e.g., about 30, 45 and 60 mm in length.
[0038] As seen in FIGS. 3 and 4, end effector 400 includes a mounting portion 430 coupled to a jaw assembly 415. A proximal end portion of mounting portion 430 is configured for selective connection to a distal end portion of shaft assembly 200 (e.g., articulation assembly 300) that has complementary structure formed thereon. Jaw assembly 415 is connected to, and extends distally from, mounting portion 430. Jaw assembly 415, as will be discussed in greater detail below, includes lower jaw member 420, which is configured to selectively support fastener cartridge 420a therein, and upper jaw member 410, each of which is secured to mounting portion 430 to enable relative movement between upper and lower jaw members 410, 420.
Jaw assembly 415 is pivotally movable to orient upper and lower jaw members 410, 420 between approximated and unapproximated states.
100391 With reference to FIG. 5, upper jaw member 410 includes an anvil body 410a with a fastener forming surface 411 including a plurality of staple forming pockets (not shown), arranged in longitudinally extending rows and configured to form the fasteners upon a firing of end effector 400, as appreciated by one skilled in the art. Anvil body 410a supports a leaf spring assembly 412 and a lever assembly 414 that are supported within a chamber 410b of body 410a.
Leaf spring assembly 412 and lever assembly 414 are enclosed within chamber 410b by a cover 410c that is selectively removable from body 410a. Together, leaf spring assembly 412 and lever assembly 414 function to bias jaw assembly 415 in the unapproximated state and enable pivotal movement of the jaw assembly 415 between the approximated and unapproximated states as described in greater detail herein.
10040] Leaf spring assembly 412 includes a leaf spring 412a that is mounted to body 410a at a first end of leaf spring 412a by a mounting plate 412b and a fastener 412c. Leaf spring 412a extends to an engagement tip 412d at a second end of leaf spring 412a that can have any suitable configuration such as a curvilinear scoop.
[0041] Lever assembly 414 includes a lever 414a that defines a pin channel 414c on one end thereof and a distal tip 414b on an opposite end thereof. Lever 414 is pivotally mounted to anvil body 410a by a pin 414d that is received through pin channel 414c of lever 414a and a pin channel 410d defined in anvil body 410a.
[0042] Anvil body 410a defines a plurality of bores on a proximal end of anvil body 410a including a drive bore 410e that receives a drive assembly 416, a pair of plunger bores 410f that receives a pair of plunger assemblies 418, and a electrical contact bore 410g that receives an electrical contact member 417 that functions to electrically communicate with instrument housing 102 when end effector 400 is secured to shaft assembly 200. Drive assembly 416 includes a drive member 416a, a gear member 416b coupled to drive member 416a, and a mounting plate 416e that supports drive member 416a and gear member 416b. Each plunger assembly of the pair of plunger assemblies 418 includes a plunger 418a that receives a spring 418b that functions to spring bias plunger 418a in a distal direction to facilitate securement of fastener cartridge 420a to cartridge assembly 420. Plunger 418a defines a pin slot 418c that receives a pin 418d to secure each plunger assembly within a respective one of the pair of plunger bores 410f when pin 418d is received within a pin channel 410h defined within anvil body 410a.
100431 Lower jaw member 420 is configured and adapted to selectively receive fastener cartridge 420a. Fastener cartridge 420a includes a tissue engaging surface 423a that defines a plurality of rows of fastener retaining slots 423b adapted to support the plurality of fasteners "F"
(and a plurality of staple pushers, not shown, but can be appreciated by those skilled in art).
Fastener cartridge 420a also includes a longitudinally extending knife slot 423c disposed between pairs of rows of fastener retaining slots 423b that is adapted to enable drive beam 426 to axially translate therethrough.
100441 Lower jaw member 420 includes a mounting member 420b, in the form of a channel, that supports fastener cartridge 420a and a base member 420c couplable to mounting member 420b. Mounting member 420b includes a mounting body 421 having a pair of wings 421a that extends proximally therefrom. The pair of wings 421a define a fastener channel 421b therethrough that is dimensioned to receive fasteners 440 advanced into a pair of passages 410i defined in upper jaw member 410 for securing upper jaw member 410 to lower jaw member 420.
A slot 421c and a screw passage 421d are defined in a plate 421e of mounting body 421 positioned adjacent to the pair of wings 421a.
100451 An actuation sled 422 is supported by lower jaw member 420 and is adapted to advance through fastener cartridge 420a to fire the plurality of fasteners supported with fastener cartridge 420a as one skilled in the art will appreciate. Lower jaw member 420 rotatably supports a drive screw 424 therein that extends substantially an entire length of lower jaw member 420. Drive screw 424 is threadably engaged with drive beam 426, which is axially slidably supported in lower jaw member 420 between proximal and distal positions in response to rotation of drive screw 424, as described in greater detail below. Drive screw 424 includes a multi-faceted head 424a, a pair of retention members 424b that define an annular channel 424c therebetween, and a distally extending threaded shaft 424d. Drive screw 424 extends through screw passage 421d so that a bracket 428, which defines a U-shaped channel 428a therethrough, secures drive screw 424 to mounting member 420b when bracket 428 is received in slot 421c and positioned within annular channel 424c. Bracket 428 and mounting member 420b cooperate to axially and lateral fix drive screw 424 in lower jaw member 420 while enabling drive screw 424 to rotate.
100461 Drive beam 426 has a substantially 1-shaped cross-sectional profile configured to progressively approximate lower jaw member 420 and upper jaw member 410 as drive beam 426 travels through knife slot 423c in fastener cartridge 420a. Drive beam 426 functions to axially displace actuation sled 422 through lower jaw member 420 and includes a retention foot 426a having an internally threaded bore 426f, a vertically oriented support strut 426b supported on retention foot 426a, and a lateral projecting member 426c formed atop support strut 426b.
Lateral projecting member 426e defines a notch 426d formed in an upper surface thereof.
Vertically oriented support strut 426b supports a knife 426e thereon that is adapted to cut tissue.
100471 FIG. 5 illustrates that mounting portion 430 is secured to the proximal end portion of upper jaw member 410. Mounting portion 430 includes a first member 432, a second member 434, and a third member 436 that are coupled together and support a spring assembly 438.
Spring assembly 438 includes a plunger 438a and a spring 438b.
100481 Referring now to FIGS. 6 and 7, end effector 400 is shown in an initial and/or unapproximated state, in which upper jaw member 410 is spaced from lower jaw member 420 relative to a longitudinal axis "X2" defined through end effector 400. In the unapproximated state, lower jaw member 420 is positioned at an acute angle (e.g., 15 degrees) relative to upper jaw member 410, drive screw 424 is disposed at an acute angle relative to mounting portion 430, and head 424a of drive screw 424 is supported at an acute angle within a bore 416d defined by drive member 416a.
[0049] As depicted in FIG. 7, when end effector 400 is in the unapproximated state, lever 414a is disposed in an extended position, due to spring biasing forces applied to lever 414a by leaf spring assembly 412, through contact with engagement tip 412d of leaf spring 412a. Drive beam 426 is disposed in a proximal-most position and leaf spring 412a of leaf spring assembly 412 is disposed in an unflexed state. In the extended position of lever 414a, distal tip 414b of lever 414a is disposed in notch 426d of lateral projecting member 426e of drive beam 426.
[0050] With reference to FIGS. 8 and 9, rotation of drive member 416a rotates head 424a of drive screw 424, which imparts rotation to drive screw 424. The pair of retention members 424b maintain drive screw 424 longitudinally fixed as the drive member 416a imparts rotational movement to drive screw 424. With drive screw 424 being threadably engaged with retention foot 426a of drive beam 426, rotational movement of drive screw 424 distally translates drive beam 426, as indicated by arrow "A." In this regard, distal tip 414b of lever 414a engages a notch sidewall 426g of drive beam 426, preventing distal translation of drive beam 426 and causing lower jaw member 420 to pivot relative to upper jaw member 410 in the direction indicated by arrow "B" and about a pivot axis "P" that is defined transversely through head 424a of drive screw 424. As lower jaw member 420 pivots toward upper jaw member 410, closing and/or approximating upper and lower jaw members 410, 420, drive beam 426 engages a bottom surface of lever 414a so that lever 414a pivots, counterclockwise (as illustrated in FIG. 9, albeit clockwise when viewed from the opposite side of end effector 400), toward upper jaw member 410 in the direction indicated by arrow "B" against spring biasing forces applied to a top surface of lever 414a through engagement tip 412d of leaf spring assembly 412. In response to pivoting movement of lever 414a toward upper jaw member 410, leaf spring 412a begins to flex to a flexed state in the direction indicated by arrow "B" so that leaf spring 412a pivots, clockwise (as illustrated in FIG. 9, albeit counterclockwise when viewed from the opposite side of end effector 400), relative to fastener 412c, toward upper jaw member 410.
[0051] As seen in FIGS. 10 and 11, further rotational movement of drive screw 424 pivots lever 414a so that distal tip 414b of lever 414a separates from notch 426a enabling lever 414a to pivot toward a retracted position and enabling lower jaw member 420 to continue to pivot toward upper jaw member 410, as indicated by arrow "C," until upper and lower jaw members 410, 420 are positioned in the approximated state. Upon separation of distal tip 414b of lever 414a and notch 426a of drive beam 426, continued rotational movement of drive screw 424 distally translates drive beam 426, as indicated by the arrow "A," beneath lever 414a along the bottom surface of lever 414a or lever assembly 414. Distal translation of drive beam 426 drives lever 414a to the retracted position in which distal tip 414b engages a bottom surface of leaf spring 412a at a point 412e along leaf spring 412a, separating engagement tip 412d from a top surface of lever 414a.
[0052] With reference to FIGS. 12 and 13, when upper and lower jaw members 410, 420 are in the approximated state, lower jaw member 420 is positioned in parallel with upper jaw member 410, and head 424a of drive screw 424 is supported within a bore 416d of drive member 416a so that drive screw 424 is parallel to upper jaw member 410. In the approximated state, continued rotation of drive screw 424 distally translates drive beam 426 through end effector 400 toward a distal end portion of end effector 400, as indicated by arrow "A."
Upon translating drive beam 426, distally past lever assembly 414, leaf spring assembly 412 urges lever assembly 414 to the extended position. Continued rotation of drive screw 424 advances actuation sled 422 through fastener cartridge 420a to fire the plurality of fasteners stored within fastener cartridge 420a for securing to tissue.
[0053] Drive screw 424 can then be rotated in an opposite direction to retract drive beam 426 proximally to the proximal-most position. More particularly, drive beam 426 is retracted proximally until drive beam 426 engages lever assembly 414, which under the spring bias of leaf spring assembly 412, urges upper and lower jaw members 410, 420 apart so that upper and lower jaw members 410, 420 are disposed in the original or unapproximated state as shown in FIG. 6.
Fastener cartridge 420a can then be removed, disposed of, and/or replaced, as desired, and the operation of end effector 400 described above can be repeated as necessary with a new, un-fired fastener cartridge 420a loaded in lower jaw member 420.
[0054] In embodiments, end effector 400 supports one or more computer or microchips (not shown) that electrically communicate signals or identification codes to the controller and/or circuit board of surgical instrument 100. The signals or identification codes can indicate whether or not fastener cartridge 420a, or portions thereof, is at least partially fired, unfired, etc. the chip may store certain specifications such as the cartridge size, staple arrangement, stale length, clamp-up distance. The chip may store a code that indicates that the end effector has been used to prevent reuse of an empty or previously used end effector. The chip may store a unique identification code for the end effector. The information on the chip may be encrypted to prevent tampering.
Reference may be made to U.S. Patent Application Serial No. 13/968,563, filed on August 16, 2013 (H-US-03833) for a detailed discussion of an exemplary end effector supporting one of more computer or microchips.
Date Recue/Date Received 2021-05-12 100551 Persons skilled in the art will understand that the structures and methods specifically described herein and shown in the accompanying figures are non-limiting exemplary embodiments, and that the description, disclosure, and figures should be construed merely as exemplary of particular embodiments. It is to be understood, therefore, that the present disclosure is not limited to the precise embodiments described, and that various other changes and modifications may be effected by one skilled in the art without departing from the scope or spirit of the disclosure. Additionally, the elements and features shown or described in connection with certain embodiments may be combined with the elements and features of certain other embodiments without departing from the scope of the present disclosure, and that such modifications and variations are also included within the scope of the present disclosure.
Accordingly, the subject matter of the present disclosure is not limited by what has been particularly shown and described.
[0019] FIG. 6 is a side, cross-sectional, perspective view of the end effector of FIGS. 3-5, as taken through 6-6 of FIG. 4, showing the end effector in an unapproximated state;
[0020] FIG. 7 is an enlarged view of the indicated area of detail shown in FIG. 6;
[0021] FIG. 8 is a side, cross-sectional view of the end effector showing a drive beam thereof in a partially advanced position;
[0022] FIG. 9 is an enlarged view of the indicated area of detail shown in FIG. 8;
[0023] FIG. 10 is a side, cross-sectional view of the end effector in an approximated state with the drive beam thereof shown in a partially advanced position;
[0024] FIG. 11 is an enlarged view of the indicated area of detail shown in FIG. 10;
[0025] FIG. 12 is an enlarged, partial, cross-sectional view of the end effector showing the drive beam partially advanced; and [0026] FIG. 13 a side, cross-sectional view of the end effector in an approximated state with the drive beam thereof shown in a distally advanced position.
DETAILED DESCRIPTION OF EMBODIMENTS
100271 Embodiments of the presently disclosed electromechanical surgical system, apparatus and/or device are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views.
As used herein the term "distal" refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are farther from the user, while the term "proximal" refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are closer to the user.
[0028] Referring initially to FIGS. 1 and 2, an electromechanical, hand-held, powered surgical system is shown and generally designated 10. Electromechanical surgical system 10 includes a surgical apparatus or device in the form of an electromechanical, hand-held, powered surgical instrument 100 that is configured for selective attachment thereto of a plurality of different end effectors 400, via a shaft assembly 200, that are each configured for actuation and manipulation by the electromechanical, hand-held, powered surgical instrument 100. In particular, surgical instrument 100 is configured for selective connection with an articulation assembly 300 of shaft assembly 200, and, in turn, shaft assembly 200 is configured for selective connection with any one of a plurality of different end effectors 400 via articulation assembly 300.
[0029] Reference may be made to U.S. Patent Application Publication No.
2009/0101692, U.S. Patent Application Publication No. 2011/0121049, and U.S. Patent Application Publication No. 2013/0098966 for a detailed description of the construction and operation of exemplary electromechanical, hand-held, powered surgical instruments, the components of which are combinable and/or interchangeable with one or more components of powered surgical system 10 described herein Date Recue/Date Received 2021-05-12 [0030] Generally, as illustrated in FIGS. 1 and 2, surgical instrument 100 includes an instrument housing 102 having a lower housing portion 104, an intermediate housing portion 106 extending from and/or supported on lower housing portion 104, and an upper housing portion 108 extending from and/or supported on intermediate housing portion 106. The surgical instrument 100 has a controller (not shown) for controlling certain functions of the surgical system, collecting data, and performing other functions. Instrument housing 102 defines a cavity (not shown) therein in which a circuit board (not shown) and a drive mechanism (not shown) are situated.
[0031] The circuit board is configured to control the various operations of surgical instrument 100, as will be set forth in additional detail below. In accordance with the present disclosure, instrument housing 102 provides a housing in which a rechargeable battery (not shown), is removably situated. The battery is configured to supply power to any of the electrical components of surgical instrument 100.
[0032] Upper housing portion 108 of instrument housing 102 has a nose or connecting portion 108a configured to accept a corresponding shaft coupling assembly 204 of transmission housing 202 of shaft assembly 200. As seen in FIG. 2, connecting portion 108a of upper housing portion 108 of surgical instrument 100 defines a cylindrical recess 108b that receives shaft coupling assembly 204 of transmission housing 202 of shaft assembly 200 when shaft assembly 200 is mated to surgical instrument 100. The connecting portion 108a of the surgical instrument 100 has at least one rotatable drive member. In some embodiments, connecting portion 108a houses a plurality of rotatable drive members or connectors (not shown), each drive member of the plurality of drive members can be independently, and/or dependently, actuatable and rotatable by the drive mechanism (not shown) housed within instrument housing 102.
100331 Upper housing portion 108 of instrument housing 102 provides a housing in which the drive mechanism (not shown) is situated. The drive mechanism is configured to drive shafts and/or gear components in order to perform the various operations of surgical instrument 100. In particular, the drive mechanism is configured to drive shafts and/or gear components in order to selectively move end effector 400 relative to shaft assembly 200; to rotate anvil assembly 200 and/or end effector 400, about a longitudinal axis "X 1 " (see FIGS. 1 and 2), relative to instrument housing 102; to move an upper jaw member or anvil assembly 410 of end effector 400 relative to a lower jaw member or cartridge assembly 420 of end effector 400; to articulate and/or rotate the shaft assembly 200; and/or to fire a fastener cartridge 420a within cartridge assembly 420 of end effector 400.
100341 In accordance with the present disclosure, the drive mechanism may include a selector gearbox assembly (not shown); a function selection module (not shown), located proximal to the selector gearbox assembly, that functions to selectively move gear elements within the selector gearbox assembly into engagement with a second motor (not shown). The drive mechanism may be configured to selectively drive one of drive members or connectors of surgical instrument 100, at a given time.
100351 As illustrated in FIGS. 1 and 2, instrument housing 102 supports a pair of finger-actuated control buttons 124, 126 and/or rocker device(s) 130 (only one rocker device being shown). Each one of the control buttons 124, 126 and rocker device(s) 130 includes a respective magnet (not shown) that is moved by the actuation of an operator. In addition, the circuit board (not shown) housed in instrument housing 102 includes, for each one of the control buttons 124, 126 and rocker device(s) 130, respective Hall-effect switches (not shown) that are actuated by the movement of the magnets in the control buttons 124, 126 and rocker device(s) 130. The actuation of Hall-effect switch (not shown), corresponding to control buttons 124, 126 causes the circuit board to provide appropriate signals to the function selection module and the input drive component of the drive mechanism to open/close end effector 400 and/or to fire a stapling/cutting cartridge within end effector 400.
[0036] Similarly, the actuation of the Hall-effect switch, corresponding to rocker device 130, causes the circuit board to provide appropriate signals to the function selection module and the input drive component of the drive mechanism to rotate end effector 400 relative to shaft assembly 200 or rotate end effector 400 and shaft assembly 200 relative to instrument housing 102 of surgical instrument 100. Specifically, movement of rocker device 130 in a first direction causes end effector 400 and/or shaft assembly 200 to rotate relative to instrument housing 102 in a first direction, while movement of rocker device 130 in an opposite, e.g., second, direction causes end effector 400 and/or shaft assembly 200 to rotate relative to instrument housing 102 in an opposite, e.g., second, direction.
100371 Turning now to FIGS. 3-13, end effector 400 is shown and described.
End effector 400 is configured and adapted to apply a plurality of linear rows of fasteners "F" (e.g., staples, see FIG. 5). In certain embodiments, the fasteners are of various sizes, and, in certain embodiments, the fasteners have various lengths or rows, e.g., about 30, 45 and 60 mm in length.
[0038] As seen in FIGS. 3 and 4, end effector 400 includes a mounting portion 430 coupled to a jaw assembly 415. A proximal end portion of mounting portion 430 is configured for selective connection to a distal end portion of shaft assembly 200 (e.g., articulation assembly 300) that has complementary structure formed thereon. Jaw assembly 415 is connected to, and extends distally from, mounting portion 430. Jaw assembly 415, as will be discussed in greater detail below, includes lower jaw member 420, which is configured to selectively support fastener cartridge 420a therein, and upper jaw member 410, each of which is secured to mounting portion 430 to enable relative movement between upper and lower jaw members 410, 420.
Jaw assembly 415 is pivotally movable to orient upper and lower jaw members 410, 420 between approximated and unapproximated states.
100391 With reference to FIG. 5, upper jaw member 410 includes an anvil body 410a with a fastener forming surface 411 including a plurality of staple forming pockets (not shown), arranged in longitudinally extending rows and configured to form the fasteners upon a firing of end effector 400, as appreciated by one skilled in the art. Anvil body 410a supports a leaf spring assembly 412 and a lever assembly 414 that are supported within a chamber 410b of body 410a.
Leaf spring assembly 412 and lever assembly 414 are enclosed within chamber 410b by a cover 410c that is selectively removable from body 410a. Together, leaf spring assembly 412 and lever assembly 414 function to bias jaw assembly 415 in the unapproximated state and enable pivotal movement of the jaw assembly 415 between the approximated and unapproximated states as described in greater detail herein.
10040] Leaf spring assembly 412 includes a leaf spring 412a that is mounted to body 410a at a first end of leaf spring 412a by a mounting plate 412b and a fastener 412c. Leaf spring 412a extends to an engagement tip 412d at a second end of leaf spring 412a that can have any suitable configuration such as a curvilinear scoop.
[0041] Lever assembly 414 includes a lever 414a that defines a pin channel 414c on one end thereof and a distal tip 414b on an opposite end thereof. Lever 414 is pivotally mounted to anvil body 410a by a pin 414d that is received through pin channel 414c of lever 414a and a pin channel 410d defined in anvil body 410a.
[0042] Anvil body 410a defines a plurality of bores on a proximal end of anvil body 410a including a drive bore 410e that receives a drive assembly 416, a pair of plunger bores 410f that receives a pair of plunger assemblies 418, and a electrical contact bore 410g that receives an electrical contact member 417 that functions to electrically communicate with instrument housing 102 when end effector 400 is secured to shaft assembly 200. Drive assembly 416 includes a drive member 416a, a gear member 416b coupled to drive member 416a, and a mounting plate 416e that supports drive member 416a and gear member 416b. Each plunger assembly of the pair of plunger assemblies 418 includes a plunger 418a that receives a spring 418b that functions to spring bias plunger 418a in a distal direction to facilitate securement of fastener cartridge 420a to cartridge assembly 420. Plunger 418a defines a pin slot 418c that receives a pin 418d to secure each plunger assembly within a respective one of the pair of plunger bores 410f when pin 418d is received within a pin channel 410h defined within anvil body 410a.
100431 Lower jaw member 420 is configured and adapted to selectively receive fastener cartridge 420a. Fastener cartridge 420a includes a tissue engaging surface 423a that defines a plurality of rows of fastener retaining slots 423b adapted to support the plurality of fasteners "F"
(and a plurality of staple pushers, not shown, but can be appreciated by those skilled in art).
Fastener cartridge 420a also includes a longitudinally extending knife slot 423c disposed between pairs of rows of fastener retaining slots 423b that is adapted to enable drive beam 426 to axially translate therethrough.
100441 Lower jaw member 420 includes a mounting member 420b, in the form of a channel, that supports fastener cartridge 420a and a base member 420c couplable to mounting member 420b. Mounting member 420b includes a mounting body 421 having a pair of wings 421a that extends proximally therefrom. The pair of wings 421a define a fastener channel 421b therethrough that is dimensioned to receive fasteners 440 advanced into a pair of passages 410i defined in upper jaw member 410 for securing upper jaw member 410 to lower jaw member 420.
A slot 421c and a screw passage 421d are defined in a plate 421e of mounting body 421 positioned adjacent to the pair of wings 421a.
100451 An actuation sled 422 is supported by lower jaw member 420 and is adapted to advance through fastener cartridge 420a to fire the plurality of fasteners supported with fastener cartridge 420a as one skilled in the art will appreciate. Lower jaw member 420 rotatably supports a drive screw 424 therein that extends substantially an entire length of lower jaw member 420. Drive screw 424 is threadably engaged with drive beam 426, which is axially slidably supported in lower jaw member 420 between proximal and distal positions in response to rotation of drive screw 424, as described in greater detail below. Drive screw 424 includes a multi-faceted head 424a, a pair of retention members 424b that define an annular channel 424c therebetween, and a distally extending threaded shaft 424d. Drive screw 424 extends through screw passage 421d so that a bracket 428, which defines a U-shaped channel 428a therethrough, secures drive screw 424 to mounting member 420b when bracket 428 is received in slot 421c and positioned within annular channel 424c. Bracket 428 and mounting member 420b cooperate to axially and lateral fix drive screw 424 in lower jaw member 420 while enabling drive screw 424 to rotate.
100461 Drive beam 426 has a substantially 1-shaped cross-sectional profile configured to progressively approximate lower jaw member 420 and upper jaw member 410 as drive beam 426 travels through knife slot 423c in fastener cartridge 420a. Drive beam 426 functions to axially displace actuation sled 422 through lower jaw member 420 and includes a retention foot 426a having an internally threaded bore 426f, a vertically oriented support strut 426b supported on retention foot 426a, and a lateral projecting member 426c formed atop support strut 426b.
Lateral projecting member 426e defines a notch 426d formed in an upper surface thereof.
Vertically oriented support strut 426b supports a knife 426e thereon that is adapted to cut tissue.
100471 FIG. 5 illustrates that mounting portion 430 is secured to the proximal end portion of upper jaw member 410. Mounting portion 430 includes a first member 432, a second member 434, and a third member 436 that are coupled together and support a spring assembly 438.
Spring assembly 438 includes a plunger 438a and a spring 438b.
100481 Referring now to FIGS. 6 and 7, end effector 400 is shown in an initial and/or unapproximated state, in which upper jaw member 410 is spaced from lower jaw member 420 relative to a longitudinal axis "X2" defined through end effector 400. In the unapproximated state, lower jaw member 420 is positioned at an acute angle (e.g., 15 degrees) relative to upper jaw member 410, drive screw 424 is disposed at an acute angle relative to mounting portion 430, and head 424a of drive screw 424 is supported at an acute angle within a bore 416d defined by drive member 416a.
[0049] As depicted in FIG. 7, when end effector 400 is in the unapproximated state, lever 414a is disposed in an extended position, due to spring biasing forces applied to lever 414a by leaf spring assembly 412, through contact with engagement tip 412d of leaf spring 412a. Drive beam 426 is disposed in a proximal-most position and leaf spring 412a of leaf spring assembly 412 is disposed in an unflexed state. In the extended position of lever 414a, distal tip 414b of lever 414a is disposed in notch 426d of lateral projecting member 426e of drive beam 426.
[0050] With reference to FIGS. 8 and 9, rotation of drive member 416a rotates head 424a of drive screw 424, which imparts rotation to drive screw 424. The pair of retention members 424b maintain drive screw 424 longitudinally fixed as the drive member 416a imparts rotational movement to drive screw 424. With drive screw 424 being threadably engaged with retention foot 426a of drive beam 426, rotational movement of drive screw 424 distally translates drive beam 426, as indicated by arrow "A." In this regard, distal tip 414b of lever 414a engages a notch sidewall 426g of drive beam 426, preventing distal translation of drive beam 426 and causing lower jaw member 420 to pivot relative to upper jaw member 410 in the direction indicated by arrow "B" and about a pivot axis "P" that is defined transversely through head 424a of drive screw 424. As lower jaw member 420 pivots toward upper jaw member 410, closing and/or approximating upper and lower jaw members 410, 420, drive beam 426 engages a bottom surface of lever 414a so that lever 414a pivots, counterclockwise (as illustrated in FIG. 9, albeit clockwise when viewed from the opposite side of end effector 400), toward upper jaw member 410 in the direction indicated by arrow "B" against spring biasing forces applied to a top surface of lever 414a through engagement tip 412d of leaf spring assembly 412. In response to pivoting movement of lever 414a toward upper jaw member 410, leaf spring 412a begins to flex to a flexed state in the direction indicated by arrow "B" so that leaf spring 412a pivots, clockwise (as illustrated in FIG. 9, albeit counterclockwise when viewed from the opposite side of end effector 400), relative to fastener 412c, toward upper jaw member 410.
[0051] As seen in FIGS. 10 and 11, further rotational movement of drive screw 424 pivots lever 414a so that distal tip 414b of lever 414a separates from notch 426a enabling lever 414a to pivot toward a retracted position and enabling lower jaw member 420 to continue to pivot toward upper jaw member 410, as indicated by arrow "C," until upper and lower jaw members 410, 420 are positioned in the approximated state. Upon separation of distal tip 414b of lever 414a and notch 426a of drive beam 426, continued rotational movement of drive screw 424 distally translates drive beam 426, as indicated by the arrow "A," beneath lever 414a along the bottom surface of lever 414a or lever assembly 414. Distal translation of drive beam 426 drives lever 414a to the retracted position in which distal tip 414b engages a bottom surface of leaf spring 412a at a point 412e along leaf spring 412a, separating engagement tip 412d from a top surface of lever 414a.
[0052] With reference to FIGS. 12 and 13, when upper and lower jaw members 410, 420 are in the approximated state, lower jaw member 420 is positioned in parallel with upper jaw member 410, and head 424a of drive screw 424 is supported within a bore 416d of drive member 416a so that drive screw 424 is parallel to upper jaw member 410. In the approximated state, continued rotation of drive screw 424 distally translates drive beam 426 through end effector 400 toward a distal end portion of end effector 400, as indicated by arrow "A."
Upon translating drive beam 426, distally past lever assembly 414, leaf spring assembly 412 urges lever assembly 414 to the extended position. Continued rotation of drive screw 424 advances actuation sled 422 through fastener cartridge 420a to fire the plurality of fasteners stored within fastener cartridge 420a for securing to tissue.
[0053] Drive screw 424 can then be rotated in an opposite direction to retract drive beam 426 proximally to the proximal-most position. More particularly, drive beam 426 is retracted proximally until drive beam 426 engages lever assembly 414, which under the spring bias of leaf spring assembly 412, urges upper and lower jaw members 410, 420 apart so that upper and lower jaw members 410, 420 are disposed in the original or unapproximated state as shown in FIG. 6.
Fastener cartridge 420a can then be removed, disposed of, and/or replaced, as desired, and the operation of end effector 400 described above can be repeated as necessary with a new, un-fired fastener cartridge 420a loaded in lower jaw member 420.
[0054] In embodiments, end effector 400 supports one or more computer or microchips (not shown) that electrically communicate signals or identification codes to the controller and/or circuit board of surgical instrument 100. The signals or identification codes can indicate whether or not fastener cartridge 420a, or portions thereof, is at least partially fired, unfired, etc. the chip may store certain specifications such as the cartridge size, staple arrangement, stale length, clamp-up distance. The chip may store a code that indicates that the end effector has been used to prevent reuse of an empty or previously used end effector. The chip may store a unique identification code for the end effector. The information on the chip may be encrypted to prevent tampering.
Reference may be made to U.S. Patent Application Serial No. 13/968,563, filed on August 16, 2013 (H-US-03833) for a detailed discussion of an exemplary end effector supporting one of more computer or microchips.
Date Recue/Date Received 2021-05-12 100551 Persons skilled in the art will understand that the structures and methods specifically described herein and shown in the accompanying figures are non-limiting exemplary embodiments, and that the description, disclosure, and figures should be construed merely as exemplary of particular embodiments. It is to be understood, therefore, that the present disclosure is not limited to the precise embodiments described, and that various other changes and modifications may be effected by one skilled in the art without departing from the scope or spirit of the disclosure. Additionally, the elements and features shown or described in connection with certain embodiments may be combined with the elements and features of certain other embodiments without departing from the scope of the present disclosure, and that such modifications and variations are also included within the scope of the present disclosure.
Accordingly, the subject matter of the present disclosure is not limited by what has been particularly shown and described.
Claims (61)
1. An end effector, comprising:
a mounting portion;
a first jaw member extending distally from the mounting portion, the first jaw member including a tissue engaging surface and supporting a lever assembly, the lever assembly including a lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position;
a second jaw member extending distally from the mounting portion and supporting a drive beam, the drive beam being selectively engagable with the lever assembly to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state; and a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge, the drive beam being configured to disengage from the lever assembly, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member.
a mounting portion;
a first jaw member extending distally from the mounting portion, the first jaw member including a tissue engaging surface and supporting a lever assembly, the lever assembly including a lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position;
a second jaw member extending distally from the mounting portion and supporting a drive beam, the drive beam being selectively engagable with the lever assembly to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state; and a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge, the drive beam being configured to disengage from the lever assembly, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member.
2. The end effector of claim 1, wherein the drive beam defines a notch therein, the lever being engaged with the notch when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in the extended position, wherein the lever is engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
3. The end effector of claim 2, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to the retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
Date Recue/Date Received 2021-05-12
Date Recue/Date Received 2021-05-12
4. The end effector of claim 3, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
5. The end effector of any one of claims 1 to 4, wherein the firstjaw member supports a spring assembly, the spring assembly including a spring configured to contact the lever to bias the lever to the extended position.
6. The end effector of any one of claims 1 to 5, wherein the second jaw member supports a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates.
7. The end effector of claim 6, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and translation of the drive beam through the fastener cartridge.
8. The end effector of claim 6, wherein the drive screw has a head projecting from a proximal end portion thereof, the head defining a pivot axis therethrough, the pivot axis being transverse to a longitudinal axis of the end effector between proximal and distal end portions of the end effector, the second jaw member configured to pivot relative to the first jaw member about the pivot axis.
9. The end effector of claim 1, wherein the first jaw member defines a ramp, the drive beam being engagable with the ramp to pivot the first jaw member and the second jaw member to the approximated state and enable the drive beam to distally translate along the first and second jaw members.
10. The end effector of any one of claims 1 to 9, wherein the drive beam supports a knife adapted to cut tissue as the drive beam translates along the fastener cartridge.
11. A powered surgical stapling apparatus, comprising:
a handle assembly;
a shaft assembly extending distally from the handle assembly;
an end effector selectively detachable from the shaft assembly, the end effector including:
Date Recue/Date Received 2021-05-12 a first jaw member including a tissue engaging surface and supporting a lever, the lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position;
a second jaw member supporting a drive beam, the drive beam being selectively engagable with the lever to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state; and a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge, the drive beam being configured to disengage from the lever, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member.
a handle assembly;
a shaft assembly extending distally from the handle assembly;
an end effector selectively detachable from the shaft assembly, the end effector including:
Date Recue/Date Received 2021-05-12 a first jaw member including a tissue engaging surface and supporting a lever, the lever pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position;
a second jaw member supporting a drive beam, the drive beam being selectively engagable with the lever to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state; and a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners in fastener retaining slots defined in a tissue engaging surface of the fastener cartridge, the drive beam being configured to disengage from the lever, to distally translate along the first jaw member and the second jaw member to approximate the first and second jaw members relative to one another, and distally translate along the fastener cartridge to fire the plurality of fasteners from the fastener retaining slots and form the plurality of fasteners against the tissue engaging surface of the first jaw member.
12. The powered surgical stapling apparatus of claim 11, wherein the drive beam defines a notch therein, the lever being engaged with the notch when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in the extended position, wherein the lever is engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
13. The powered surgical stapling apparatus of claim 12, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to the retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
14. The powered surgical stapling apparatus of claim 13, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
15. The powered surgical stapling apparatus of any one of claims 11 to 14, wherein the first jaw member supports a leaf spring configured to contact the lever to bias the lever to the extended position.
Date Recue/Date Received 2021-05-12
Date Recue/Date Received 2021-05-12
16. The powered surgical stapling apparatus of any one of claims 11 to 15, wherein the second jaw member supports a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates.
17. The powered surgical stapling apparatus of claim 16, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and translation of the drive beam through the fastener cartridge.
18. A surgical stapling apparatus, comprising:
a handle assembly;
a shaft assembly extending distally from the handle assembly;
an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member supporting a lever that is pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position, the lever being in contact with a leaf spring to spring bias the lever to the extended position; and a second jaw member supporting a drive beam, the drive beam being selectively engagable with the lever to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state.
a handle assembly;
a shaft assembly extending distally from the handle assembly;
an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member supporting a lever that is pivotally connected to the first jaw member and pivotally movable relative to the first jaw member between an extended position and a retracted position, the lever being in contact with a leaf spring to spring bias the lever to the extended position; and a second jaw member supporting a drive beam, the drive beam being selectively engagable with the lever to facilitate a pivotal movement of the second jaw member relative to the first jaw member between an unapproximated state and an approximated state.
19. An electrically-powered end effector, comprising:
a first jaw member;
a lever movably coupled to the first jaw member; and a second jaw member supporting a fastener cartridge and a drive beam, the fastener cartridge supporting a plurality of fasteners, wherein contact between the drive beam and the lever enables relative movement between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members.
a first jaw member;
a lever movably coupled to the first jaw member; and a second jaw member supporting a fastener cartridge and a drive beam, the fastener cartridge supporting a plurality of fasteners, wherein contact between the drive beam and the lever enables relative movement between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members.
20. The electrically-powered end effector of claim 19, wherein at least one of the first or second jaw members is coupled to an electrical power source that is configured to electrically power at least one of the first or second jaw members.
Date Recue/Date Received 2021-05-12
Date Recue/Date Received 2021-05-12
21. The electrically-powered end effector of claim 19, wherein the drive beam is axially translatable along the first and second jaw members to move the first and second jaw members between an unapproximated state and an approximated state.
22. The electrically-powered end effector of claim 21, wherein the drive beam defines a notch therein, the lever being engaged with the notch when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in an extended position, wherein the lever is engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
23. The electrically-powered end effector of claim 22, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to a retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
24. The electrically-powered end effector of claim 23, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
25. The electrically-powered end effector of claim 22, wherein the first jaw member supports a spring assembly, the spring assembly including a spring configured to contact the lever to bias the lever to the extended position.
26. The electrically-powered end effector of claim 19, wherein the first jaw member defines a ramp, the drive beam being engagable with the ramp to pivot the first jaw member and the second jaw member to the approximated state and enable the drive beam to distally translate along the first and second jaw members.
27. The electrically-powered end effector of claim 19, wherein the drive beam supports a knife adapted to cut tissue as the drive beam translates along the first and second jaw members.
28. An electrically-powered end effector, comprising:
a first jaw member;
Date Recue/Date Received 2021-05-12 a lever coupled to the first jaw member; and a second jaw member supporting a fastener cartridge and a drive beam, the fastener cartridge supporting a plurality of fasteners, the drive beam selectively engagable with the lever to facilitate relative movement between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members, the second jaw member supporting a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates, the drive screw having a head defining a pivot axis therethrough, the second jaw member configured to pivot relative to the first jaw member about the pivot axis.
a first jaw member;
Date Recue/Date Received 2021-05-12 a lever coupled to the first jaw member; and a second jaw member supporting a fastener cartridge and a drive beam, the fastener cartridge supporting a plurality of fasteners, the drive beam selectively engagable with the lever to facilitate relative movement between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members, the second jaw member supporting a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates, the drive screw having a head defining a pivot axis therethrough, the second jaw member configured to pivot relative to the first jaw member about the pivot axis.
29. The electrically-powered end effector of claim 28, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and translation of the drive beam through the fastener cartridge.
30. The electrically-powered end effector of claim 28, wherein the head projects from a proximal end portion of the drive screw, the pivot axis being transverse to a longitudinal axis of the end effector between proximal and distal end portions of the end effector.
31. An electrically-powered surgical stapling apparatus, comprising:
a handle assembly;
a shaft assembly extending distally from the handle assembly; and an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member;
a lever coupled to the first jaw member and positioned to move relative to the first j aw member;
a second jaw member;
a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners; and a drive beam supported by the second jaw member and being selectively engagable with the lever, wherein contact between the drive beam and the lever enables relative movement Date Recue/Date Received 2021-05-12 between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members.
a handle assembly;
a shaft assembly extending distally from the handle assembly; and an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member;
a lever coupled to the first jaw member and positioned to move relative to the first j aw member;
a second jaw member;
a fastener cartridge secured to the second jaw member and supporting a plurality of fasteners; and a drive beam supported by the second jaw member and being selectively engagable with the lever, wherein contact between the drive beam and the lever enables relative movement Date Recue/Date Received 2021-05-12 between the first and second jaw members, the drive beam configured to fire the fasteners as the drive beam axially translates along the first and second jaw members.
32. The electrically-powered surgical stapling apparatus of claim 31, wherein the handle assembly includes an electrical power source configured to electrically power actuation of the end effector.
33. The electrically-powered surgical stapling apparatus of claim 31, wherein the drive beam defines a notch therein, the lever being engaged with the notch when the first and second jaw members are in an unapproximated state, when the drive beam is in a proximal position, and when the lever is in an extended position, wherein the lever is engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to an approximated state.
34. The electrically-powered surgical stapling apparatus of claim 33, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to a retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
35. The electrically-powered surgical stapling apparatus of claim 34, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
36. The electrically-powered surgical stapling apparatus of claim 31, wherein first jaw member supports a leaf spring configured to contact the lever to bias the lever to an extended position.
37. The electrically-powered surgical stapling apparatus of claim 31, wherein the second jaw member supports a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates.
38. The electrically-powered surgical stapling apparatus of claim 37, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal Date Recue/Date Received 2021-05-12 movement of the second jaw member relative to the first jaw member and translation of the drive beam along first and second jaw members.
39. An end effector for an electrically-powered surgical stapling apparatus, the end effector comprising:
a first jaw member;
a lever pivotally connected to the first jaw member to move relative to the first jaw member;
and a second jaw member supporting a drive beam, wherein contact between the drive beam and the lever enables relative movement between the first and second jaw members.
a first jaw member;
a lever pivotally connected to the first jaw member to move relative to the first jaw member;
and a second jaw member supporting a drive beam, wherein contact between the drive beam and the lever enables relative movement between the first and second jaw members.
40. The end effector of claim 39, wherein the lever is positioned to move between an extended position and a retracted position.
41. The end effector of claim 40, wherein the lever is in contact with a spring to bias the lever to the extended position.
42. An electrically-powered end effector, comprising:
a first jaw member;
a lever coupled to the first jaw member; and a second jaw member supporting a drive beam defining a notch therein, the notch selectively engagable by the lever to block relative movement between the first and second jaw members, and the notch selectively disengagable with the lever to facilitate relative movement between the first and second jaw members.
a first jaw member;
a lever coupled to the first jaw member; and a second jaw member supporting a drive beam defining a notch therein, the notch selectively engagable by the lever to block relative movement between the first and second jaw members, and the notch selectively disengagable with the lever to facilitate relative movement between the first and second jaw members.
43. The electrically-powered end effector of claim 42, wherein at least one of the first or second jaw members is coupled to an electrical power source that is configured to electrically power at least one of the first or second jaw members.
44. The electrically-powered end effector of claim 42, wherein the drive beam is axially translatable along the first and second jaw members to move the first and second jaw members between an unapproximated state and an approximated state.
Date Recue/Date Received 2021-05-12
Date Recue/Date Received 2021-05-12
45. The electrically-powered end effector of claim 44, wherein the lever is engaged with the notch when the first and second jaw members are in the unapproximated state, when the drive beam is in a proximal position, and when the lever is in an extended position, wherein the lever is engaged with the notch of the drive beam to limit distal translation of the drive beam prior to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
46. The electrically-powered end effector of claim 45, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to a retracted position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to the approximated state.
47. The electrically-powered end effector of claim 46, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
48. The electrically-powered end effector of claim 45, wherein the first jaw member supports a spring assembly, the spring assembly including a spring configured to contact the lever to bias the lever to the extended position.
49. The electrically-powered end effector of claim 42, wherein the second jaw member supports a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates.
50. The electrically-powered end effector of claim 49, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and translation of the drive beam through a fastener cartridge supported by the second jaw member.
51. The electrically-powered end effector of claim 49, wherein the drive screw has a head projecting from a proximal end portion thereof, the head defining a pivot axis therethrough, the pivot axis being transverse to a longitudinal axis of the end effector between proximal and distal Date Recue/Date Received 2021-05-12 end portions of the end effector, the second jaw member configured to pivot relative to the first jaw member about the pivot axis.
52. The electrically-powered end effector of claim 42, wherein the first jaw member defines a ramp, the drive beam being engagable with the ramp to pivot the first jaw member and the second jaw member and enable the drive beam to distally translate along the first and second jaw members.
53. The electrically-powered end effector of claim 42, wherein the drive beam supports a knife adapted to cut tissue as the drive beam translates along the first and second jaw members.
54. An electrically-powered surgical stapling apparatus, comprising:
a handle assembly;
a shaft assembly extending distally from the handle assembly; and an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member;
a lever coupled to the first jaw member;
a second jaw member; and a drive beam supported by the second jaw member and defining a notch selectively engagable by the lever to block relative movement between the first and second jaw members, and the notch selectively disengagable with the lever to facilitate relative movement between the first and second jaw members.
a handle assembly;
a shaft assembly extending distally from the handle assembly; and an end effector selectively detachable from the shaft assembly, the end effector including:
a first jaw member;
a lever coupled to the first jaw member;
a second jaw member; and a drive beam supported by the second jaw member and defining a notch selectively engagable by the lever to block relative movement between the first and second jaw members, and the notch selectively disengagable with the lever to facilitate relative movement between the first and second jaw members.
55. The electrically-powered surgical stapling apparatus of claim 54, wherein the handle assembly includes an electrical power source configured to electrically power actuation of the end effector.
56. The electrically-powered surgical stapling apparatus of claim 54, wherein the lever is engaged with the notch when the first and second jaw members are in an unapproximated state, when the drive beam is in a proximal position, and when the lever is in an extended position.
57. The electrically-powered surgical stapling apparatus of claim 56, wherein the lever is configured to disengage from the notch as the lever pivots from the extended position to a retracted Date Recue/Date Received 2021-05-12 position in response to the second jaw member pivoting relative to the first jaw member from the unapproximated state to an approximated state.
58. The electrically-powered surgical stapling apparatus of claim 57, wherein the drive beam is distally translatable when the first and second jaw members are in the approximated state and the lever is in the retracted position.
59. The electrically-powered surgical stapling apparatus of claim 54, wherein first jaw member supports a leaf spring configured to contact the lever to bias the lever to an extended position.
60. The electrically-powered surgical stapling apparatus of claim 54, wherein the second jaw member supports a drive screw operably associated with the drive beam to translate the drive beam as the drive screw rotates.
61. The electrically-powered surgical stapling apparatus of claim 60, wherein the drive beam includes a retention foot that threadably receives the drive screw, the drive screw being coupled to a rotatable drive member, wherein rotation of the drive screw in the retention foot facilitates pivotal movement of the second jaw member relative to the first jaw member and translation of the drive beam along the first and second jaw members.
Date Recue/Date Received 2021-05-12
Date Recue/Date Received 2021-05-12
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2014
- 2014-01-22 US US14/161,092 patent/US9655616B2/en active Active
- 2014-11-03 AU AU2014256425A patent/AU2014256425B2/en not_active Ceased
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- 2014-12-22 EP EP14199697.5A patent/EP2898838B1/en active Active
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CN104783853B (en) | 2019-06-18 |
CN104783853A (en) | 2015-07-22 |
CA2873238A1 (en) | 2015-07-22 |
JP6497917B2 (en) | 2019-04-10 |
ES2649175T3 (en) | 2018-01-10 |
AU2014256425A1 (en) | 2015-08-06 |
AU2014256425B2 (en) | 2018-12-06 |
EP2898838A1 (en) | 2015-07-29 |
US9655616B2 (en) | 2017-05-23 |
JP2015136624A (en) | 2015-07-30 |
US10542973B2 (en) | 2020-01-28 |
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